Dinan Ignition Coils are designed to be a direct plug-and-play replacement, or upgrade, to factory coils and provide greater energy output. With up to 10% more energy output than stock you are assured a stronger and more consistent spark. Whether you are replacing dilapidated coils that are causing sluggish acceleration and/or misfires or simply upgrading for a more reliable and consistent spark your ignition system will be more efficient with a new set of Dinan coils. For those that like to showcase engine modifications they also come standard with a bold red housing to complete that high-performance look! The N2 series style coil applies to the following engines: N63TU3, S63TU4* and S68. Compatible factory part # Cross Reference: 12138692611. *S63TU4 Not all S63TU4 applications use the N2 series coil. The F9x M5/M8 utilize the N series coil whereas the F9x X5M/X6M utilize N2 series coils. Please ensure proper coil selection prior to purchase.